<?php
$a=-15;
$abs=abs($a);
echo $abs;
echo "<hr>";

$a=10.6;
$ceil=ceil($a);
echo $ceil;
echo "<hr>";

$a=2.6;
$floor=floor($a);
echo $floor;
echo "<hr>";


$a=8.4;
$round=round($a);
echo $round;
echo "<hr>";


$a=[21,23,51,35];
$max=max($a);
echo $max;
echo "<hr>";


$a=[21,23,51,17,];
$min=min($a);
echo $min;
echo "<hr>";


$rand=rand(10,100);
echo $rand;
echo "<hr>";

$pow=pow(4,4);
echo $pow;
echo "<hr>";

$pow=pow(2,4);
echo $pow;
echo "<hr>";

$a="17397574442";
$number_format=number_format($a);
echo $number_format;
echo "<hr>";

$b=15.6;
$cd=is_int($b);
if($cd){
    echo "haa";
}else{
    echo "yak";
}

